Navigation Links
New materials may bring advanced optical technologies, cloaking
Date:1/25/2011

WEST LAFAYETTE, Ind. - Researchers are developing a new class of "plasmonic metamaterials" as potential building blocks for advanced optical technologies, including ultrapowerful microscopes and computers, improved solar cells, and a possible invisibility cloak.

The new materials could make possible "nanophotonic" devices for numerous applications, said Alexandra Boltasseva, an assistant professor of electrical and computer engineering at Purdue University.

Unlike natural materials, metamaterials may possess an index of refraction less than one or less than zero. Refraction occurs as electromagnetic waves, including light, bend when passing from one material into another. It causes the bent-stick-in-water effect, which occurs when a stick placed in a glass of water appears crooked when viewed from the outside.

Being able to create materials with an index of refraction that's negative or between one and zero promises a range of potential breakthroughs in a new field called transformation optics. However, development of new technologies using metamaterials has been hindered by two major limitations: too much light is "lost," or absorbed by metals such as silver and gold contained in the metamaterials, and the materials need to be more precisely tuned so that they possess the proper index of refraction.

Now, researchers are proposing a new approach to overcome these obstacles. Findings will be detailed in an article appearing Friday (Jan. 21) in the journal Science. The article was written by Boltasseva and Harry Atwater, Howard Hughes Professor and a professor of applied physics and materials science at the California Institute of Technology.

The researchers are working to replace silver and gold in materials that are created using two options: making semiconductors more metallic by adding metal impurities to them; or adding non-metallic elements to metals, in effect making them less metallic. Examples of these materials include aluminum oxides and titanium nitride, which looks like gold and is used to coat the domes of Russian churches.

Researchers have tested some of the new materials, demonstrating their optical properties and finding that they outperform silver and gold, in work based at the Birck Nanotechnology Center in Purdue's Discovery Park.

Plasmonic metamaterials are promising for various advances, including a possible "hyperlens" that could make optical microscopes 10 times more powerful and able to see objects as small as DNA; advanced sensors; new types of light-harvesting systems for more efficient solar cells; computers and consumer electronics that use light instead of electronic signals to process information; and a cloak of invisibility.

Optical nanophotonic circuits might harness clouds of electrons called "surface plasmons" to manipulate and control the routing of light in devices too tiny for conventional lasers.

Some of the new materials are showing promise in uses involving near-infrared light, the range of the spectrum critical for telecommunications and fiberoptics. Other materials also might work for light in the visible range of the spectrum. The new materials might be tuned so that their refractive index is ideal for specific ranges of the spectrum, allowing their use for particular applications.

Future photonics technologies will revolve around new types of optical transistors, switches and data processors. Conventional computers transmit and process pieces of information in serial form, or one piece at a time. However, future computers may use parallel streams of data, resulting in much faster networks and computers.


'/>"/>

Contact: Emil Venere
venere@purdue.edu
765-494-4709
Purdue University
Source:Eurekalert  

Related biology technology :

1. Carbon-Based Nano-Materials and Devices Conference
2. Nanomechanical Testing in Materials Research and Development
3. Strange new twist: Berkeley researchers discover Möbius symmetry in metamaterials
4. Iowa State, Ames Lab physicist developing, improving designer optical materials
5. Nano squid skin: DOD awards $6M for metamaterials research
6. Using new materials to make more reliable nanoelectromechanical systems
7. Georgia Techs Walt de Heer awarded Materials Research Society Medal
8. Wiley-VCH launches new journal Advanced Energy Materials
9. Reportlinker Adds Next Generation U.S. and E.U. Biomaterials/BioMedical Devices: Market Trends & Commercial Implications
10. Cypress Denies Ramius Legal Right to Stockholder List Materials
11. NASA funds development of nanoscale materials for high energy density lithium-ion batteries
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
New materials may bring advanced optical technologies, cloaking
(Date:2/28/2017)... ... February 28, 2017 , ... ... of antibody therapeutics from millions-diverse immune repertoires, today announced a strategic partnership with ... strains genetically engineered to express human antibodies. The partnership will use GigaGen technology ...
(Date:2/28/2017)... , Feb. 28, 2017  ITL Limited ... company, supplier and strategic partner that provides innovative ... individual health management, formally announces its rebrand to ... name change is part of the Company,s unified ... launch of an integrated corporate website, ITLHealthGroup.com ...
(Date:2/28/2017)... and NEW YORK , February ... License Application accepted by the FDA for avelumab  ... disease has metastasized   ... Germany , in the US and ... US Food and Drug Administration (FDA) has accepted for Priority ...
(Date:2/27/2017)... -- A Europe-wide survey of institutes conducted by the ... their research treat them with due care. The survey polled a ... the results indicates that there is a strong commitment among animal ... the principles of the 3Rs (Refine, Reduce, Replace)  ... What are the 3Rs? ...
Breaking Biology Technology:
(Date:2/13/2017)... 2017  RSA Conference -- RSA, a Dell Technologies ... to enhance fraud detection and investigation across digital ... Fraud & Risk Intelligence Suite. The new platform ... insights from internal and external sources as well ... customers from targeted cybercrime attacks. "Fraudsters ...
(Date:2/9/2017)... Feb. 9, 2017 The biomass boiler market ... the biomass boiler market globally in terms of revenue ... boilers. The market for biomass boilers has been segmented ... application, and country/region. The market based on feedstock type, ... residues, biogas & energy crops, urban residues, and others. ...
(Date:2/8/2017)... , Feb. 7, 2017 Report Highlights ... The global ... reach $11.4 billion by 2021, growing at a compound annual ... - An overview of the global markets for synthetic biology. ... estimates for 2016, and projections of compound annual growth rates ...
Breaking Biology News(10 mins):